Internal-combustion engine.



Y N. E, GRQTHERS.

' INTERNAL COMBUSTION ENGINE.

APPLIGATION FILED JAN. 30,1912.

1,040,153. Patented Oct. 1, 1912.

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NOBLE E. CROTHERS, F CHICAGO, ILLINOIS.

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Patented Oct. 1, 1912.

Application filed January 30, 1912. Serial No, 674,234.

:i citizen of the ilnited States, residingat v(liicago, in the county of Cook and State of Illinois, have invented certain new and useful lniproveinents in lnternal- Combustion llngines, of which the following is a Specification. i

This invention relates to internal combustion ene' es of the two-cycle type in which the wor inwcylinder in comniunication with an ufially alined pump-chamber.y in which latter operates a plunger which is a part fri the engine piston.

the object of the invention to provide an engine of the kind stated embodying certain novel features of construction to be hereinafter described and claimed, including an improved cylinder structure and means for lubricating the moving;` parts of the engine.

ln order that the invention may he better understood, reference is had to the accompanying drawing' forming a part of this .epecitication in which- Figure 1 is a central vertical section of the engine. Fie'. 2 is a similar View Showing the parts in another position. Fig. 3 is a crfss section on the line 3 3 of Fig. 1.

ltcfcrriini specificallrto the drawing, 5 d, notes the workingr c i/'linder of the engine, haringy near crank end an exhaust port (En the other end of the cylinder is mounted a cylinder i the interior of which forms a pump and lubricant chamber. The two cylinder.-; are in axial alinement and are faisiened together iu antY suitable manner; or il y ma),Y he cast in one piece.

The diameter of the cylinden is greater than that of the cylinder 5, and the former is closed at its outer eind by a head S. its other end being open. The head S has a hollow. central, cylindrical extension -9 which stationary und extends into the interior of the cylinder T and has'its outer surface D overl to receive' packing rings 10. rlChe external diameter of the extension 9 is the same as the diameter ot' the boreof the cylinder 5.

ln the c'tf'lindet rofl of which is in works a piston 117 the licatcd al' l2. The rear and of the pinion ias a hollow cylindrical exit-:nien 'la which'panses into the interior of i .l lin-der T in sliding.,r contact with the nal-fe' urtare of the extension S). The piston W provided with packing rings 14.

The piston extension 13 is formed intermediate its ends with a head l5 which 'serves as a plunger. said head working in the space between the ettens'ion 9 and the wall of the cylinder T. said space, between the plunger and the head S serving` as a lubricantchamber, und the space on the other side of the plunger being the piunp-chamber in which the combustible mixture is compressed. said mixture entering the pump chamber through an inlet 1b containing a cheek-mire ltr- In the piston extension 13 on one side of, and adjacent to the plunger 15, is a. port 17, and on the other side of the plunger, said eX- tensior. has ports 1S. In the head 8 are vent ports 19.

The inner end of the extension 9 is closed by a head Q0 which is opposite the rear end of the pist-on l1 and carries an ignter 21, which later extends into the space within tie piston extension 13 to the rear of thepiston l1y and in the latter is a port 22 which extends from its rear end and opens through one side.

The engine operates as follows: On the inward stroke of the piston 11 and the plunger 15 a charge of fuel is drawn into the pump-chamber, and said charge is compressed on the outward stroke of the plunger and the piston. At the end of the outward stroke, the port 17 passes the inner end of the extension 9 and thus places the pumpchamber in co-.Ynmunication with the space to the rear of the piston 11, said space being the explosion chamber. This charge therefore passes into the explosion-chamber at the end of the outward stroke of the piston and the plunger, and said charge is recompres'scd on the inward stroke, and ignited at the proper time. The piston now makes another outward stroke, this being the eXplosion stroke, and at the cud thereof, the port QQ comes opposite the port (l, whereupon the spent gases are exhausted. On the explosion stroke another charge is being` compressed in the pump-chamber, and said charge passes into the explosion chamber at the end of said stroke as already described. It will therefore be evident that the engine makes a power stroke for every revolution of the shaft. The lubi'icantchamber behind the plunger 15 keeps the parts perfectly lubricated.' the lubricant following through the ports 18 to the surface of the extension 9.

By the structure herein described an etiicient two-Cyclo internal-combustion engine is had, and also one which is devoid ofconij )lieuleil pui-is' to get outol order. Inns-v niueh as the extension 9 is hollow7 the, pu1npeliziinhei' `will not become oveilienteel.

rThe preferredembodiment of the invention has been shown but it will be evident that various changes in the Structu al details nmv he uncle without n departure 'from the spil? :unl scope of the invention.

.1 Gmini:

in un inlvei'nulcombustion engine, a working Cylinilei'luing :1n exhaust porli,n pumpeviinlleiiu :igual :llineinent with the workiuQ-rjvlinflm' und having' :l fuel inlet, a plunxv-zn'lfi in :he puinp-eyliinlei, the space on one Sull ul" ille plunger being n. lubricant reservoir. n iffosfui'e for the outei1 end of' the pump-cylinder, said closure having a cylindrical extension into the hoi'e of the pump cylinder, the diameter of Suid here being greater than the, bore of the vuoiking-eyliir dei', u piston in the Working-cylinder, Suid, piston having a hollow cylindrical extension into the pump-Cylinder and fit-ting around Athe aforesaid closure extension, aid @vlnr diical extension carrying the aforesaid plnngel', :1nd having n port which passes the closure extension nt the end of the outward folie of the piston und the plunger.

ln tesluiony whereof I :xliixjinjv Signuiure in presence of two witnesses.

NOBLE E. C {OTHIG 1S. Witnesses FRANK Cizo'runns, H. G. Lnvioiin-Lon.

Copies of this patent may be obtained for five cents each, by addressng the Cor loner of Palen'rs,

Washington, D. C." 

